Bug#212919: drop fstab creation from autopartkit

[Gaudenz Steinlin <gaudenz@soziologie.ch>]

pere wrote sometime ago:
> When partconf-mkfstab is creating a proper fstab, I can remove the
> code in autopartkit to do the same, and this problem will go away.
> 
> I am not sure if that has happened yet.

Do you know what needs to be done? I would really like to drop 
created-fstab from autopartkit because it make autoparkit show up
in situations where it never ever should be run (eg. just before 
kernel-installer and after base-installer). 
I had a look at partconf-mkfstab and I didn't see any disadvantages of
it, but then I may have overlooked something.

gaudenz